{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T01:51:10Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 3,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:04:07+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:31:22+00:00",
        "engine": "codex",
        "fields": [
          "agent_conduct"
        ],
        "answering_review": "abae7478cbfdaa01b7c539e72dacc0a08b3793632c7871770c77a1dbd2d608ac"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:25+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q118",
    "registryId": "vr.tr.april",
    "name": "April",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "INF.KNW"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q118/",
  "model": {
    "registry_id": "vr.tr.april",
    "name": "April",
    "purpose": "Let an agent describe April as a calendar month, relay its length, position, seasons and notable observances, explain its name and history, and route date-specific questions to entries for individual days.",
    "definition": "The fourth month of the year in the Julian and Gregorian calendars, with 30 days, following March and preceding May, falling in spring in the northern hemisphere and autumn in the southern, named from the Latin Aprilis of uncertain origin, and containing observances such as April Fools Day, Easter in many years, Earth Day on 22 April and many national holidays; the arrangement of its days by starting weekday, such as April starting on Monday, determines the calendar layout of the month.",
    "what_it_is_for": "Not applicable; a calendar month.",
    "affordances": [
      "relay length and position",
      "relay observances and seasons",
      "explain name and history",
      "route to specific days"
    ],
    "distinguishing_features": [
      "30 days",
      "Spring month in the north",
      "Easter often falls in April",
      "April Fools Day"
    ],
    "appearance": "Not a visible object; a page of the calendar.",
    "visual_identification": [
      "Fourth month, 30 days",
      "Between March and May, spring in the north",
      "Aprilis in the Roman calendar was the second month"
    ],
    "physical_properties": [
      {
        "quantity": "days",
        "typical_range": "30",
        "unit": "count",
        "note": ""
      },
      {
        "quantity": "position",
        "typical_range": "4",
        "unit": "month",
        "note": "Gregorian calendar"
      },
      {
        "quantity": "starts on same weekday as",
        "typical_range": "July",
        "unit": "month",
        "note": "every year, and January in leap years"
      }
    ],
    "families_and_kinds": [
      "April in the Gregorian and Julian calendars",
      "April starting on each weekday as calendar layouts",
      "April in other calendar traditions and names",
      "observances in April"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "month of the Gregorian calendar",
        "why": "in registry terms"
      },
      {
        "relation": "follows",
        "target": "March",
        "why": "the third month"
      },
      {
        "relation": "precedes",
        "target": "May",
        "why": "the fifth month"
      },
      {
        "relation": "contains",
        "target": "Earth Day",
        "why": "on 22 April"
      }
    ],
    "identifiers": [
      {
        "scheme": "ISO 8601",
        "value_or_pattern": "04",
        "note": "month number"
      }
    ],
    "standards_and_regulation": [
      "ISO 8601 date representation",
      "National public holiday laws for April observances"
    ],
    "failure_modes_and_hazards": [
      "Confusing observance dates across countries",
      "Movable feasts such as Easter not always in April",
      "Seasonal assumptions by hemisphere"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "State the number of days in April and its place in the calendar.",
        "Convert April dates between the Gregorian and Julian calendars using calendar rules applicable to the specified date and year.",
        "Schedule events in April in the user's time zone."
      ],
      "must_not": [
        "Assume April falls in spring for users in the southern hemisphere.",
        "Publish April 1 hoaxes that could pass for real news.",
        "Mix up April dates written in day-month and month-day order."
      ],
      "requires_human": [
        "Fixing deadlines in April that carry legal or financial consequences, such as tax filing."
      ]
    },
    "ethics": {
      "considerations": [
        "Many tax and fiscal years end or start in April; date errors cost people money.",
        "April fool hoaxes can spread as misinformation."
      ],
      "affected_parties": [
        "People with April deadlines",
        "Readers of news on April 1"
      ]
    },
    "owners": {
      "steward": "The public: held in common; the calendar is maintained by convention and civil law.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q118: April",
      "url": "https://www.wikidata.org/wiki/Q118",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: April",
      "url": "https://en.wikipedia.org/wiki/April",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "calendar",
        "name": "Calendar",
        "description": "April in the calendar.",
        "rationale": "Reference.",
        "layers": [
          {
            "id": "position",
            "name": "Position",
            "description": "Position and length.",
            "findings": [
              {
                "id": "position-finding",
                "name": "Position",
                "description": "Position.",
                "questions": [
                  {
                    "text": "Where does April fall in the year, how long is it, and which weekday does it start on in a given year?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the Gregorian April or another calendar?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "layout",
            "name": "Layout",
            "description": "Calendar layouts.",
            "findings": [
              {
                "id": "layout-finding",
                "name": "Layout",
                "description": "Layout.",
                "questions": [
                  {
                    "text": "How do the seven layouts of April by starting weekday relate to other months?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific day?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "observances",
        "name": "Observances",
        "description": "Observances.",
        "rationale": "Sources.",
        "layers": [
          {
            "id": "international",
            "name": "International",
            "description": "International days.",
            "findings": [
              {
                "id": "international-finding",
                "name": "International",
                "description": "International.",
                "questions": [
                  {
                    "text": "What international observances fall in April, such as Earth Day and World Health Day?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the specific observance?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "national",
            "name": "National",
            "description": "National and religious.",
            "findings": [
              {
                "id": "national-finding",
                "name": "National",
                "description": "National.",
                "questions": [
                  {
                    "text": "What national holidays and religious feasts commonly fall in April, with sources?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "seasons",
        "name": "Seasons",
        "description": "Seasons and nature.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "seasons",
            "name": "Seasons",
            "description": "Seasons.",
            "findings": [
              {
                "id": "seasons-finding",
                "name": "Seasons",
                "description": "Seasons.",
                "questions": [
                  {
                    "text": "What is the season in April in each hemisphere, and what weather is typical?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits spring?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "astronomy",
            "name": "Astronomy",
            "description": "Astronomy.",
            "findings": [
              {
                "id": "astronomy-finding",
                "name": "Astronomy",
                "description": "Astronomy.",
                "questions": [
                  {
                    "text": "What astronomical events such as the Lyrid meteor shower occur in April?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Name and culture.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "name",
            "name": "Name",
            "description": "Name and history.",
            "findings": [
              {
                "id": "name-finding",
                "name": "Name",
                "description": "Name.",
                "questions": [
                  {
                    "text": "Where does the name April come from, and how was it placed in Roman calendars?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the Roman calendar?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "culture",
            "name": "Culture",
            "description": "Culture.",
            "findings": [
              {
                "id": "culture-finding",
                "name": "Culture",
                "description": "Culture.",
                "questions": [
                  {
                    "text": "How does April appear in literature, proverbs and traditions such as April Fools Day?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits April Fools Day?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should observances be linked through individual day entries?",
    "How should calendar layout aliases be recorded?",
    "How should names of April in other languages be recorded?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}